const store = require('../../utils/store.js'); const api = require('../../utils/api.js'); const { toastErr } = require('../../utils/ui.js'); // 卡片画布尺寸(逻辑像素)。真实导出会按 dpr 放大 const W = 620; const H = 812; // 在 canvas 2d 上加载一张图(远程或本地),resolve 出可直接 drawImage 的 image 对象。 // 加载失败 resolve(null)——头像或小程序码缺一张不该让整张卡画不出来 function loadImage(canvas, src) { return new Promise((resolve) => { if (!src) return resolve(null); const img = canvas.createImage(); img.onload = () => resolve(img); img.onerror = () => resolve(null); img.src = src; }); } Page({ data: { petId: '', card: null, cardImg: '', qrReady: false, saving: false, }, onLoad(q) { store .ready() .then(() => { const id = (q && q.id) || store.currentPetId(); if (!id) { wx.showToast({ title: '先选一只毛孩子', icon: 'none' }); return; } this.setData({ petId: id }); return api.petIDCard(id); }) .then((card) => { if (!card) return; this.setData({ card, qrReady: !!card.qr_ready }); // 布局要等页面渲染完 canvas 节点才拿得到,放 nextTick wx.nextTick(() => this.draw()); }) .catch((e) => toastErr(e)); }, draw() { wx.createSelectorQuery() .select('#idCanvas') .fields({ node: true, size: true }) .exec((res) => { const node = res && res[0] && res[0].node; if (!node) return; let dpr = 2; try { dpr = (wx.getWindowInfo ? wx.getWindowInfo() : wx.getSystemInfoSync()).pixelRatio || 2; } catch (e) { dpr = 2; } node.width = W * dpr; node.height = H * dpr; const ctx = node.getContext('2d'); ctx.scale(dpr, dpr); const c = this.data.card || {}; // 两张远程图都就绪再开画,否则小程序码会画不上或画一半(plan 里点过名的坑) Promise.all([loadImage(node, c.avatar_url), loadImage(node, c.qr_url)]).then(([avatar, qr]) => { this.paint(ctx, node, c, avatar, qr); }); }); }, paint(ctx, node, c, avatar, qr) { ctx.clearRect(0, 0, W, H); // 外层留白背景 ctx.fillStyle = '#F3EFE8'; ctx.fillRect(0, 0, W, H); const pad = 30; const cardW = W - pad * 2; // ── 上半张:资料区(蓝紫渐变)── const topH = 430; const g1 = ctx.createLinearGradient(pad, pad, W - pad, topH); g1.addColorStop(0, '#FFF0D6'); g1.addColorStop(0.5, '#FFE0EC'); g1.addColorStop(1, '#E6EEFF'); this.roundRect(ctx, pad, pad, cardW, topH - pad, 28); ctx.fillStyle = g1; ctx.fill(); // 肉垫水印:卡内几枚淡淡的爪印,裁剪在圆角卡里 ctx.save(); this.roundRect(ctx, pad, pad, cardW, topH - pad, 28); ctx.clip(); ctx.globalAlpha = 0.06; ctx.font = '120px sans-serif'; ctx.textAlign = 'center'; ctx.textBaseline = 'middle'; ctx.fillText('🐾', W - pad - 70, pad + 90); ctx.font = '80px sans-serif'; ctx.fillText('🐾', W - pad - 150, topH - 70); ctx.restore(); ctx.globalAlpha = 1; ctx.textBaseline = 'alphabetic'; // 头像圆(描一圈白边更像证件照) const avX = pad + 34, avY = pad + 34, avD = 120; ctx.save(); ctx.beginPath(); ctx.arc(avX + avD / 2, avY + avD / 2, avD / 2, 0, Math.PI * 2); ctx.closePath(); ctx.clip(); if (avatar) { // 居中裁剪成正方形再画:竖图/横图都不会被压变形(cover 效果) const iw = avatar.width || avD; const ih = avatar.height || avD; const side = Math.min(iw, ih); const sx = (iw - side) / 2; const sy = (ih - side) / 2; ctx.drawImage(avatar, sx, sy, side, side, avX, avY, avD, avD); } else { ctx.fillStyle = '#FFD9A3'; ctx.fillRect(avX, avY, avD, avD); ctx.fillStyle = '#8A5A18'; ctx.font = '52px sans-serif'; ctx.textAlign = 'center'; ctx.textBaseline = 'middle'; ctx.fillText(c.species === '狗狗' ? '🐶' : '🐱', avX + avD / 2, avY + avD / 2); } ctx.restore(); ctx.textBaseline = 'alphabetic'; // 头像白边圈 ctx.beginPath(); ctx.arc(avX + avD / 2, avY + avD / 2, avD / 2, 0, Math.PI * 2); ctx.strokeStyle = 'rgba(255,255,255,.9)'; ctx.lineWidth = 5; ctx.stroke(); // 资料行 const infoX = avX + avD + 28; let y = pad + 52; const line = (label, value) => { ctx.textAlign = 'left'; ctx.font = '24px sans-serif'; ctx.fillStyle = '#9A8F82'; ctx.fillText(label, infoX, y); ctx.fillStyle = '#2D2925'; ctx.font = '600 26px sans-serif'; ctx.fillText(value || '—', infoX + ctx.measureText(label).width + 14, y); y += 46; }; // 一行放两组「标签 值」,X 起点给定 const pair = (l1, v1, l2, v2) => { ctx.textAlign = 'left'; ctx.font = '24px sans-serif'; ctx.fillStyle = '#9A8F82'; ctx.fillText(l1, infoX, y); ctx.fillStyle = '#2D2925'; ctx.font = '600 26px sans-serif'; const w1 = ctx.measureText(v1 || '—').width; ctx.fillText(v1 || '—', infoX + 62, y); if (l2 && v2) { const x2 = infoX + 62 + w1 + 26; ctx.fillStyle = '#9A8F82'; ctx.font = '24px sans-serif'; ctx.fillText(l2, x2, y); ctx.fillStyle = '#2D2925'; ctx.font = '600 26px sans-serif'; ctx.fillText(v2, x2 + 62, y); } y += 46; }; line('姓名', c.name); pair('性别', c.gender, '品种', c.breed); line('出生', c.birthday); pair('星座', c.zodiac, '体重', c.weight); line('介绍', c.intro); // 身份 ID:虚线 + 号 const idY = pad + 344; ctx.strokeStyle = 'rgba(122,74,8,.22)'; ctx.lineWidth = 1; ctx.setLineDash([6, 6]); ctx.beginPath(); ctx.moveTo(pad + 34, idY); ctx.lineTo(W - pad - 34, idY); ctx.stroke(); ctx.setLineDash([]); ctx.textAlign = 'left'; ctx.font = '22px sans-serif'; ctx.fillStyle = '#9A8F82'; ctx.fillText('身份 ID', pad + 34, idY + 34); ctx.font = '600 26px sans-serif'; ctx.fillStyle = '#2D2925'; ctx.fillText(c.id_no || '', pad + 34 + 90, idY + 34); // ── 下半张:证件标题 + 小程序码 ── const botY = topH + 12; const botH = H - botY - pad; const g2 = ctx.createLinearGradient(pad, botY, W - pad, botY + botH); g2.addColorStop(0, '#E8F0FF'); g2.addColorStop(1, '#F0E8FF'); this.roundRect(ctx, pad, botY, cardW, botH, 28); ctx.fillStyle = g2; ctx.fill(); ctx.textAlign = 'left'; ctx.fillStyle = '#7D89A8'; ctx.font = '22px sans-serif'; ctx.fillText('宠 星 人 地 球 移 民', pad + 40, botY + 60); ctx.fillStyle = '#4A5878'; ctx.font = '700 52px sans-serif'; ctx.fillText('居民身份卡', pad + 40, botY + 128); ctx.fillStyle = '#8A93A8'; ctx.font = '22px sans-serif'; ctx.fillText('签发机构 肉垫计划', pad + 40, botY + 180); ctx.fillText('有效期限 ' + (c.validity || '永久有效'), pad + 40, botY + 214); // 官方认证印章(装饰):淡棕红、旋一点角度,像盖上去的 ctx.save(); ctx.translate(W - pad - 120, botY + 100); ctx.rotate((-14 * Math.PI) / 180); ctx.globalAlpha = 0.5; ctx.strokeStyle = '#B4623F'; ctx.fillStyle = '#B4623F'; ctx.textAlign = 'center'; ctx.textBaseline = 'middle'; ctx.lineWidth = 4; ctx.beginPath(); ctx.arc(0, 0, 60, 0, Math.PI * 2); ctx.stroke(); ctx.lineWidth = 1.5; ctx.beginPath(); ctx.arc(0, 0, 50, 0, Math.PI * 2); ctx.stroke(); ctx.font = '32px sans-serif'; ctx.fillText('★', 0, -16); ctx.font = '700 22px sans-serif'; ctx.fillText('肉垫计划', 0, 16); ctx.font = '12px sans-serif'; ctx.fillText('官方认证', 0, 38); ctx.restore(); ctx.globalAlpha = 1; ctx.textBaseline = 'alphabetic'; // 小程序码(未发布时 qr 为 null,画个占位框) const qrD = 128, qrX = W - pad - 40 - qrD, qrY = botY + botH - 40 - qrD; ctx.fillStyle = '#fff'; this.roundRect(ctx, qrX, qrY, qrD, qrD, 12); ctx.fill(); if (qr) { ctx.drawImage(qr, qrX + 8, qrY + 8, qrD - 16, qrD - 16); } else { ctx.fillStyle = '#B5A99D'; ctx.font = '20px sans-serif'; ctx.textAlign = 'center'; ctx.fillText('小程序码', qrX + qrD / 2, qrY + qrD / 2 - 4); ctx.fillText('待发布', qrX + qrD / 2, qrY + qrD / 2 + 26); } wx.canvasToTempFilePath( { canvas: node, fileType: 'png', success: (r) => this.setData({ cardImg: r.tempFilePath }), fail: () => wx.showToast({ title: '生成失败,稍后再试', icon: 'none' }), }, this, ); }, roundRect(ctx, x, y, w, h, r) { ctx.beginPath(); ctx.moveTo(x + r, y); ctx.arcTo(x + w, y, x + w, y + h, r); ctx.arcTo(x + w, y + h, x, y + h, r); ctx.arcTo(x, y + h, x, y, r); ctx.arcTo(x, y, x + w, y, r); ctx.closePath(); }, onSave() { if (!this.data.cardImg) return wx.showToast({ title: '还在生成,稍等一下', icon: 'none' }); if (this.data.saving) return; this.setData({ saving: true }); wx.saveImageToPhotosAlbum({ filePath: this.data.cardImg, success: () => wx.showToast({ title: '已保存到相册', icon: 'success' }), fail: (err) => { const msg = (err && err.errMsg) || ''; if (msg.indexOf('cancel') >= 0) return; // 拒过一次后 authorize 不再弹,必须引导去设置页 if (msg.indexOf('auth deny') >= 0 || msg.indexOf('authorize') >= 0) { wx.showModal({ title: '需要相册权限', content: '保存身份卡需要允许访问相册,去设置里打开一下?', confirmText: '去设置', success: (r) => r.confirm && wx.openSetting({}), }); return; } wx.showToast({ title: '保存失败', icon: 'none' }); }, complete: () => this.setData({ saving: false }), }); }, onShareAppMessage() { const c = this.data.card || {}; return { title: `${c.name || '我家毛孩子'} 的居民身份卡`, path: '/pages/idcard/idcard?id=' + this.data.petId, imageUrl: this.data.cardImg || '', // 用画好的卡当分享封面 }; }, });